01755naa a2200217 a 450000100080000000500110000800800410001902400350006010000230009524501490011826000090026752010580027665000130133465300280134765300220137570000230139770000220142070000170144270000160145977300620147521002802019-05-02       2019    bl uuuu     u00u1 u    #d7 a10.1007/s00203-018-1594-z2DOI1 aBREDA. F. A. da F.  aModulation of nitrogen metabolism of maize plants inoculated with Azospirillum brasilense and Herbaspirillum seropedicae.h[electronic resource]  c2019  aMaize is highly responsive to the application of nitrogen to achieve high productivity. Inoculation with diazotrophic bacteria can improve plant growth with low N fertilization. The objective was to evaluate the inoculation of two species of diazotrophs on N metabolism in maize plants, in the presence of two concentrations of nitrogen in a hydroponic system. A factorial arrangement composed of two N levels (3.0 and 0.3 mM), with the presence of Hs?Herbaspirillum seropedicae, and Ab?Azospirillum brasilense or not. The parameters used were dry mass; N, P, and K accumulation; nitrate reductase activity; soluble fractions in roots and leaves. The inoculation altered the N metabolism and promoted greater development of maize plants, as well as a higher accumulation of P and K in the shoots. A more intensive process of N assimilation was evidenced when the plants were inoculated with H. seropedicae, leading to increased levels of NO3− and reduced N-amino, sugars, and NH4+ in leaves associated with high N level, opposite of A. brasilense.  aNitrogen  aInoculation Diazotrophs  aSoluble fractions1 aSILVA, T. F. R. da1 aSANTOS, S. G. dos1 aALVES, G. C.1 aREIS, V. M.  tArchives of Microbiologygv. 201, n. 4, p. 547-558, 2019.